BA 571 then BA 410 at Heathrow
Milan Linate → London → Valencia
Timetable, London time
15:15BA 571 from Milan Linate at the gate
15:00BA 410 to Valencia leaves the gate
23 h 45 apart on the timetable, overnight
BA 410 leaves 23 h 45 after BA 571 arrives on the timetable: more than half a day, so not a connection we count.